The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.
Deficiency of LKB1 in heart prevents ischemia-mediated activation of AMPKα2 but not AMPKα1
Open accessAbstract
Recent studies indicate that the LKB1 is a key regulator of the AMP-activated protein kinase (AMPK), which plays a crucial role in protecting cardiac muscle from damage during ischemia. We have employed mice that lack LKB1 in cardiac and skeletal muscle and studied how this affected the activity of cardiac AMPKα1/α2 under normoxic, ischemic, and anoxic conditions. In the heart lacking cardiac muscle LKB1, the basal activity of AMPKα2 was vastly reduced and not increased by ischemia or anoxia. Phosphorylation of AMPKα2 at the site of LKB1 phosphorylation (Thr 172) or phosphorylation of acetyl-CoA carboxylase-2, a downstream substrate of AMPK, was ablated in ischemic heart lacking cardiac LKB1. Ischemia was found to increase the ADP-to-ATP (ADP/ATP) and AMP-to-ATP ratios (AMP/ATP) to a greater extent in LKB1-deficient cardiac muscle than in LKB1-expressing muscle. In contrast to AMPKα2, significant basal activity of AMPKα1 was observed in the lysates from the hearts lacking cardiac muscle LKB1, as well as in cardiomyocytes that had been isolated from these hearts. In the heart lacking cardiac LKB1, ischemia or anoxia induced a marked activation and phosphorylation of AMPKα1, to a level that was only moderately lower than observed in LKB1-expressing heart. Echocardiographic and morphological analysis of the cardiac LKB1-deficient hearts indicated that these hearts were not overtly dysfunctional, despite possessing a reduced weight and enlarged atria. These findings indicate that LKB1 plays a crucial role in regulating AMPKα2 activation and acetyl-CoA carboxylase-2 phosphorylation and also regulating cellular energy levels in response to ischemia. They also provide genetic evidence that an alternative upstream kinase can activate AMPKα1 in cardiac muscle.
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Cites
The Kinase LKB1 Mediates Glucose Homeostasis in Liver and Therapeutic Effects of Metformin
Shaw, R. J., Lamia, K. A., Vasquez, D., Koo, S.-H., Bardeesy, N., DePinho, R. A., Montminy, M., & Cantley, L. C. (2005) · Science · doi:10.1126/science.1120781 · Cited by 1,950
Shaw, R. J., Kosmatka, M., Bardeesy, N., Hurley, R. L., Witters, L. A., DePinho, R. A., & Cantley, L. C. (2004) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0308061100 · Cited by 1,797
LKB1 is the upstream kinase in the AMP-activated protein kinase cascade
Woods, A., Johnstone, S. R., Dickerson, K., Leiper, F. C., Fryer, L. G. D., Neumann, D., Schlattner, U., Wallimann, T., Carlson, M., & Carling, D. (2003) · Current Biology · doi:10.1016/j.cub.2003.10.031 · Cited by 1,650
Hawley, S. A., Pan, D. A., Mustard, K. J., Ross, L., Bain, J., Edelman, A. M., Frenguelli, B. G., & Hardie, D. G. (2005) · Cell Metabolism · doi:10.1016/j.cmet.2005.05.009 · Cited by 1,589
LKB1 is a master kinase that activates 13 kinases of the AMPK subfamily, including MARK/PAR‐1
Lizcano, J. M., Göransson, O., Toth, R., Deak, M., Morrice, N. A., Boudeau, J., Hawley, S. A., Udd, L., Mäkelä, T. P., Hardie, D. G., et al. (2004) · The EMBO Journal · doi:10.1038/sj.emboj.7600110 · Cited by 1,381
Self-citationRussell, R. R., Li, J., Coven, D. L., Pypaert, M., Zechner, C., Palmeri, M., Giordano, F. J., Mu, J., Birnbaum, M. J., & Young, L. H. (2004) · Journal of Clinical Investigation · doi:10.1172/jci19297 · Cited by 738
Jørgensen, S. B., Viollet, B., Andreelli, F., Frøsig, C., Birk, J. B., Schjerling, P., Vaulont, S., Richter, E. A., & Wojtaszewski, J. F. P. (2004) · Journal of Biological Chemistry · doi:10.1074/jbc.m306205200 · Cited by 553
Effect of Exercise Intensity on Skeletal Muscle AMPK Signaling in Humans
Chen, Z.-P., Stephens, T. J., Murthy, S., Canny, B. J., Hargreaves, M., Witters, L. A., Kemp, B. E., & McConell, G. K. (2003) · Diabetes · doi:10.2337/diabetes.52.9.2205 · Cited by 369
Sakamoto, K., Göransson, O., Hardie, D. G., & Alessi, D. R. (2004) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00074.2004 · Cited by 299
Cited by
AMPK: a nutrient and energy sensor that maintains energy homeostasis
Hardie, D. G., Ross, F. A., & Hawley, S. A. (2012) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm3311 · Cited by 4,602
Steinberg, G. R., & Kemp, B. E. (2009) · Physiological Reviews · doi:10.1152/physrev.00011.2008 · Cited by 1,637
Foretz, M., Hébrard, S., Leclerc, J., Zarrinpashneh, E., Soty, M., Mithieux, G., Sakamoto, K., Andreelli, F., & Viollet, B. (2010) · Journal of Clinical Investigation · doi:10.1172/jci40671 · Cited by 1,181
Self-citationAMP-Activated Protein Kinase – Development of the Energy Sensor Concept
Hardie, D. G., Hawley, S. A., & Scott, J. W. (2006) · The Journal of Physiology · doi:10.1113/jphysiol.2006.108944 · Cited by 813
Molecular basis of physiological heart growth: fundamental concepts and new players
Maillet, M., van Berlo, J. H., & Molkentin, J. D. (2013) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm3495 · Cited by 536
Metadata
- Authors
- Sakamoto, K., Zarrinpashneh, E., Budas, G. R., Pouleur, A.-C., Dutta, A., Prescott, A. R., Vanoverschelde, J.-L., Ashworth, A., Jovanović, A., Alessi, D. R., & Bertrand, L.
- Venue
- American Journal of Physiology-Endocrinology and Metabolism
- Publisher
- American Physiological Society
- Published
- 2006-05
- Volume
- 290
- Issue
- 5
- Pages
- E780-E788
- ISSN
- 0193-1849 (ISSN-L)
- 1522-1555
- OpenAlex
- W2148072839
- Cited by
- 220
- References
- 9
- FWCI
- 5.30
- Type
- journal article
- Language
- en
- Open access
- green
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- Sakamoto, K., Zarrinpashneh, E., Budas, G. R., Pouleur, A.-C., Dutta, A., Prescott, A. R., Vanoverschelde, J.-L., Ashworth, A., Jovanović, A., Alessi, D. R., & Bertrand, L. (2006). Deficiency of LKB1 in heart prevents ischemia-mediated activation of AMPKα2 but not AMPKα1. American Journal of Physiology-Endocrinology and Metabolism. https://doi.org/10.1152/ajpendo.00443.2005
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